Abstract: Processes and apparatus are provided for the nitrification and denitrification of digested biosolids. The rate of nitrification/denitrification is controlled by sensing the amount of oxygen or another parameter in the digested biosolids and adjusting the amount of oxygen supplied to the biosolids, such as through automated adjustment of an aeration device. To promote nitrification, the amount of oxygen available in the digested biosolids is increased. To promote denitrification, the amount of oxygen available in the digested biosolids is decreased. The processes and apparatus are well suited for reducing the concentration of ammonium in biosolids or off-gas resulting from aerobic thermophilic digestion of wastewater sludges. The processes and apparatus are well suited for reducing the dosage of chemicals required for dewatering operations of biosolids.
Type:
Grant
Filed:
May 26, 2009
Date of Patent:
July 17, 2012
Assignee:
Thermal Process Systems, LLC
Inventors:
Kevin L. Staton, Jim Eloff, Richard L. Pressley
Abstract: A process and apparatus for treating biosolids from biological wastewater treatment. The temperature of autothermal aerobic treatment of biosolids is controlled by sensing the oxidation/reduction potential of the solution and adjusting the amount of oxygen or biosolids supplied to the solution through a jet aerator (1) having a liquid header (3) for the recirculation of the solution and an air header (5).
Type:
Grant
Filed:
April 30, 2001
Date of Patent:
April 13, 2004
Assignee:
Thermal Process Systems, LLC
Inventors:
Richard L. Pressley, Jeffrey D. Williamson
Abstract: The invention relates generally to a process and apparatus for treating biosolids resulting from the treatment of biological wastewater streams. The invention relates to autothermal aerobic treatment of biosolids where temperature is controlled by adjusting the amount of shear generated through jet aeration devices. The invention provides for a truly aerobic environment under which thermophilic microorganisms will thrive. The invention also relates to a method and apparatus for controlling foam generated in a treatment reactor.
Type:
Grant
Filed:
December 29, 2000
Date of Patent:
February 4, 2003
Assignee:
Thermal Process Systems, LLC
Inventors:
Richard L. Pressley, Jeffrey D. Williamson
Abstract: The invention relates generally to a process and apparatus for treating biosolids resulting from the treatment of biological wastewater streams. The invention relates to autothermal aerobic treatment of biosolids where temperature is controlled by sensing the oxidation/reduction potential of a treated solution and adjusting the amount of oxygen or the amount of biosolids supplied to the solution. The invention provides for a truly aerobic environment under which thermophilic microorganisms will thrive.
Type:
Grant
Filed:
July 1, 1999
Date of Patent:
March 20, 2001
Assignee:
Thermal Process Systems, LLC
Inventors:
Richard L. Pressley, Jeffrey D. Williamson
Abstract: The invention relates generally to a process and apparatus for treating biosolids resulting from the treatment of biological wastewater streams. The invention relates to autothermal aerobic treatment of biosolids where temperature is controlled by adjusting the amount of shear generated through jet aeration devices. The invention provides for a truly aerobic environment under which thermophilic microorganisms will thrive. The invention also relates to a method and apparatus for controlling foam generated in a treatment reactor.
Type:
Grant
Filed:
January 20, 1999
Date of Patent:
January 2, 2001
Assignee:
Thermal Process Systems, LLC
Inventors:
Richard L. Pressley, Jeffrey D. Williamson